Image forming apparatus

An image forming apparatus for forming a toner image on a recording material, comprising:

• a motor provided in said image forming apparatus and rotatable in a first direction and a second direction opposite to the first direction;
• a unit which includes a first rotatable member and a second rotatable member and which is mountable to and dismountable from a main assembly of said image forming apparatus;
• an input gear provided in said unit and configured to permit input of a driving force of said motor from said image forming apparatus;
• a first transmission path provided in said unit, wherein when said motor rotates in the first direction, the driving force is transmitted from said input gear to said first rotatable member and is not transmitted from said input gear to said second rotatable member;
• a second transmission path provided in said unit, wherein when said motor rotates in the second direction, the driving force is transmitted from said input gear to said second rotatable member and is not transmitted from said input gear to said first rotatable member;
• a rotation detecting portion capable of detecting rotation of said second rotatable member;
• and
• a controller configured to execute an operation in an abnormality output mode for outputting abnormality information,
• wherein if said first rotatable member is not rotated despite rotation of said motor in the first direction, said controller inputs a signal for rotating said motor in the second direction, and
• (1) if said second rotatable member is not rotated, said controller outputs abnormality information on said motor or a drive transmission path for transmitting the driving force from said motor to said input gear, and
• (2) if said second rotatable member is rotated, said controller outputs abnormality information on said unit.